Which correctly revises the sentence?
.The squirrel, who ran in circles around the circumference of the tree, chattered angrily at the curious cat.
.The squirrel who ran in circles around the circumference of the tree, chattered angrily at the curious cat.
.The squirrel, who ran in circles around the circumference of the tree chattered angrily, at the curious cat.
.The squirrel who ran in circles around the circumference of the tree chattered angrily, at the curious cat.